Rudder for screw driven vessels



y 1957 F. F. VFARWELL, SR 2,

RUDDEIR FOR SCREW DRIVEN VESSELS Filed June 7, 1955 vBY United StatesPatent RUDDER FOR SCREW DRIVEN VESSELS Frederick F. Farwell, Sr., Rumson, N. J.

Application June 7, 1955, Serial No. 513,722

2 Claims. (Cl. 114-166) This invention relates to rudders for boats.

It is an object of the present invention to provide an improved rudder which will afford maneuverability in reverse as well as in the forward direction.

It is another object of the present invention to pro;

vide a rudder of the above type which provides protection for the propeller of the boat against driftwood, lines or the like.

Other objects of the invention are to provide a rudder having the above objects in mind which is of simple construction, inexpensive to manufacture, has a minimum number of parts and is efficient in operation.

For other objects and a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which:

Figure l is a side view shown partly in elevation and partly in section of a preferred embodiment of the present invention;

Fig. 2 is a top plan view thereof taken along the lines 22 of Fig. l; and

Fig. 3 is a rear elevational view of the invention.

Referring now more in detail to the drawing, indicates generally a boat having a propellerll aswell as a tiller 12 mounted upon the tiller post 13, all in a manner well known to those skilled in the art. The lower end of the tiller post 13 is rotatably mounted in the bearing member 14, the reduced extension 15 thereof being retained in the bearing member by means of the cotter pin 16.

In the practice of my invention, a hollow rudder indicated generally at 17 is provided of substantially square cross section having rounded corners, Fig. 3, and is adapted to permit the rotation therewithin of the propeller 11. The rudder 17 is mounted intermediate the interrupted ends of the tiller post 13 by means of the flanges 18 and the nut and bolt assemblies 19. The rudder 17 includes the central portion 20 of constant outside diameter as well as the outwardly flared rear portion 21.

The rudder also includes the outwardly flared forward portion 22. As shown in Fig. 2, the rudder 17 may be rotated in either direction about the vertical axis of the ice;

2 tiller post 13 by means of the tiller 12, without contacting the propeller 11.

This invention is a very necessary part of a boat today, as the public in general is not able to handle a boat with the old time type of blade rudder when the boat is moving in reverse. With this invention a boat can be steered in reverse with the same ease as forwardly moving boats. While maneuvering in forward motion with the motor in low speed, the boat will actually turn in less than its length. In reverse, it moves about two feet in one complete turn. In reverse, it will turn either way of its own length at low motor speed. The rudder, it will be noted, helps protect the propeller from driftwood and lines and is inexpensive to manufacture. The forwardly, outwardly flared portion 22 permits entrance of the water and eliminates cavitation. The flat sides and top and bottom on the afterpart of the rudder (Fig.

3) will eliminate vibration.

While various changes may be made in the detail con- 'struction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

Having thus set forth and disclosed the nature of my invention, what is claimed is:

1. In a boat having a two-part rudder post comprising spaced upper and lowervparts and a propeller, a hollow rudder arranged between and secured to the parts of said rudder post. and enclosing said propeller in free- 1y spaced relationship thereto, the axis of said propeller intersecting the axis of said rudder post, said hollow rudder having a central circular portion of constant diameter terminating in an outwardly flared rear portion and an outwardly flared forward portion, said outwardly flared rear portion being of substantially greater length than said flared forward v portion, said flared forward portion being of circular cross section and said flared rearportion being of substantially rectangular cross section with'spac'ed substantially flat sides and spaced substantially flat top and bottom portions thereof, and a tiller secued to the upper part of said rudder post, for rotating said hollow rudder about the propeller.

2. In a boat according to claim 1, said rudder at the top and bottom thereof having flanges secured to the upper and lower rudder post parts, a bearing on the boat for the lower post part and means for securing said rudder and rudder post flanges together whereby to mount said rudder about the propeller on said rudder post.

References Cited in the file of this patent UNITED STATES PATENTS 123,629 Hemje Feb. 13, 1872 899,359 Wadagaki Sept. 22, 1908 2,601,837 Dean July 1, 1952 FOREIGN PATENTS 28,162 Switzerland May 7, 1903 

